Is activated starch an alternative to polyacrylamide based polymers?

Activated starch as an alternative to polyacrylamide-based polymers for in-line filtration of low turbidity source water Dual starch–polyacrylamide polymer system for improved flocculation Water Res., 124 ( 2017), pp. 202 – 209, 10.1016/j.watres.2017.07.044 J. Environ.

Can activated starch polymer replace Pam during ballasted flocculation?

This study identified the conditions favorable to the use of an activated starch polymer as an alternative to PAM during ballasted flocculation: mixing intensity and time, coagulation pH, ballast size and chemical composition, and polymer charge density.

What is the difference between starch-based and Pam-based polymers?

Starch-based polymers have a more branched structure than the linear PAM configuration and hence have smaller chain lengths that reduce aggregation via interparticle bridging. Moreover, activated starch flocs have been shown to be more sensitive to shear than flocs produced with PAM ( Lapointe and Barbeau, 2015 ).

Can activated starch be used in flocculation?

However, the use of activated starch in flocculation systems requires higher polymer dosages than the use of conventional high-molecular-weight (MW) PAM (3–5 times higher) ( Gaid and Sauvignet, 2011, Lapointe and Barbeau, 2015 ).

What is a starch–PAM system?

A starch–PAM system reduces PAM usage for conventional and ballasted flocculation. With 0.4 mg starch/L, PAM is reduced by 69% (surface water) and 45% (wastewater). With the dual system (G: 165-200 s −1 ), floc resistance is not impacted.

Can a starch–Pam blend solution be used for polymer coaddition?

Therefore, a starch–PAM blend solution could be used for polymer coaddition to simplify the preparation and injection of the polymers.